Bushfires Flashcards
The fire triangle has three elements
Oxygen, heat, fuel
The greater the fuel load the _____ the fire is
Hotter
What accounts for over half of bushfires?
Lightning
Do Flames at the fire front ignite anything flammable?
Yes
What is the most dangerous type of fire front?
Running crown fire
How do spot fires start?
When hot embers or debris are picked up by the wind
How far can embers fly in the wind?
Up to 30 Kms
How fast do grass fires pass?
5-10 seconds
How long do grass fires smoulder for?
Only Minutes after fire has passed
How intense are grass fires?
Low to Moderate
Do bushfires move faster than grass fires?
No
What are hotter bushfires or grassfires?
Bushfires
How do Australian eucalypts survive in times of drought?
By reducing water loss by shedding their leaves
Why do eucalypts contain aromatic oils and waxes?
To discourage insects from eating them
The low water content along with the oils characteristic of eucalypts in drought means?
They burn explosively in bushfires